Journal Paper

• Haonan Liu, Ririka Sawada, SHINJI ANDO, Shana YANAGIMOTO, Yoshiyuki YANAGIMOTO. ミリ波帯域（25～330 GHz）における各種ポリイミドの誘電特性, ポリイミド最近の進歩2025, Vol. 32, Page P15, Sept. 2025.
• Yoshiyuki Tsurusaki, Ririka Sawada, Haonan Liu, SHINJI ANDO. 高誘電率・低誘電正接を示す含硫黄ポリイミドの高周波誘電特性, ポリイミド最近の進歩2025, Vol. 32, Page P21, Sept. 2025.
• Ririka Sawada, Haonan Liu, SHINJI ANDO. ポリイミドのGHz帯誘電物性と赤外分光分析により評価した吸湿量および水分吸着挙動との相関解明, ポリイミド最近の進歩2025, Vol. 32, Page P23, Sept. 2025.
• Yuka AZUMA, Riku TAKAHASHI, Natsuko SASHI, Kan Hatakeyama, Yuta NABAE, Ririka SAWADA, Shinji ANDO, Teruaki HAYAKAWA. Hydrosilylation-Derived Silicon-Containing Hydrocarbon-Based Polymers Exhibiting Ultralow Dielectric Loss and High Thermal Stability, RSC Polym. Chem., RSC Polym. Chem., Vol. 16, in press, July 2025.  Official location  
• Riku Takahashi, Ririka Sawada, Kan Hatakeyama, Yuta Nabae, SHINJI ANDO, Teruaki Hayakawa. Development of Polyimides with Low Dielectric Loss Tangent by Incorporating Polysiloxanes with Phenyl Side Groups, Macromolecular Rapid Communications, John Wiley & Sons, Ltd, Vol. n/a, No. n/a, pp. 2500115, Apr. 2025.  Official location  
• Yoshiyuki Tsurusaki, Ririka Sawada, Haonan Liu, Shinji Ando. Optical, Dielectric, and Thermal Properties of Bio‐Based Polyimides Derived from An Isosorbide‐Containing Diamine, Macromolecular Rapid Communications, John Wiley & Sons, p. 2401113, Feb. 2025.  Official location  
• Hayato Maeda, Yucheng Liang, Ryohei Hosoya, Rika Marui, Erina Yoshida, Yuqian Chen, Kan Hatakeyama, Yuta Nabae, Shiori Nakagawa, Junko Morikawa, Masatoshi Tokita, Ririka Sawada, SHINJI ANDO, Yoshihiro Hayashi, Ryo Yoshida, HIDEMINE FURUYA, Teruaki Hayakawa. Smectic liquid crystalline poly(ester imide)s with low dielectric dissipation factors for high-frequency applications, Polymer Journal, Vol. 57, No. 6, pp. 665-677, Feb. 2025.  Official location  

International Conference (Not reviewed / Unknown)

• Natsuko SASHI, Erina YOSHIDA, Hayato MAEDA, Kan HATAKEYAMA, Yuta NABAE, Ririka SAWADA, Shinji ANDO, Teruaki HAYAKAWA. Synthesis and Properties of Polyimides Incorporating Double-Decker Silsesquioxane for Low-Dielectric Properties, PPC-19, Kita-Kyushu, PPC-19, Vol. 19, p. 07E14, July 2025.
• Haonan LIU, Ririka SAWADA, Yoshiyuki TSURUSAKI, Shinji ANDO. Broadband (10-330 GHz) Dielectric Characterization of Polyimides for High-Frequency Communication Applications, Itnl.Polyimide Conf (IPIC-25), Itnl.Polyimide Conf (IPIC-25), Vol. 2, p. 42, July 2025.
• Ririka SAWADA, Haonan LIU, Shinji ANDO. Vibrational Spectroscopic Analysis on Relative Humidity and Water Sorption Dependence of Dielectric Properties of Polyimides, Itnl.Polyimide Conf (IPIC-25), Itnl.Polyimide Conf (IPIC-25), Vol. 2, p. 25, July 2025.
• Daiki KUBOTA, Yoshiyuki TSURUSAKI, Ririka SAWADA, Haonan LIU, Shinji ANDO. Optical and Dielectric Properties at High-Frequency (20GHz) of Sulfur-Containing Polyimides, Itnl.Polyimide Conf (IPIC-25), Itnl.Polyimide Conf (IPIC-25), Vol. 2, p. 118, July 2025.
• Shinji ANDO, Ririka SAWADA, Yoshiyuki TSURUSAKI, Haonan LIU. Polarization Analysis and Humidity/Water Absorption Dependence of Dielectric Properties of Polyimides for 5G/6G Communications, WCCE12, Beijing, WCCE12, Vol. 12, p. 9, July 2025.
• Haonan LIU, Ririka SAWADA, Shinji ANDO. Highly Fluorinated Polyimides Exhibiting Extremely Low Frequency and Humidity Dependence in High-Frequency Broadband (10~330 GHz) Dielectric Properties, WCCE12, Beijing, WCCE12, Vol. 12, p. P1, July 2025.
• Natsuko SASHI, Erina YOSHIDA, Hayato MAEDA, Kan HATAKEYAMA, Yuta NABAE, Ririka SAWADA, Shinji ANDO, Teruaki HAYAKAWA. Synthesis of Low Dielectric Poly(esterimide)s Incorporating Double-Decker Silsesquioxane Units, Photopolym. Sci. Technol. Conf., Himeji, Photopolym. Sci. Technol. Conf., Himeji, Vol. 38, No. 2, pp. 137-144, June 2025.
• Shinji ANDO, Ririka SAWADA, Haonan LIU. Anisotropic Polarization Analysis and Humidity Dependence of Dielectric Properties of Polyimides for 5G/6G Wireless Applications, ISAOP-2025, El Jadida, ISAOP-2025,, Vol. 2025, No. 1, p. 29, May 2025.
• Ririka SAWADA, Haonan LIU, Shinji ANDO. Elucidating the Mechanism of Water Sorption Dependence in Dielectric Properties at GHz Region of Polyimides by Quantification and Analysis of Water Sorption and Its Behavior Using Infrared Spectroscopy, APME 2025, Catania, APME 2025, Vol. 2025, No. 1, p. 149, May 2025.
• Haonan LIU, Ririka SAWADA, Shinji ANDO. High-Frequency Broadband (10~330 Ghz) Dielectric Properties of Polyimides Applicable to 5G/6G Wireless Communications, APME 2025, Catania, APME 2025, Vol. 2025, No. 1, p. 166, May 2025.

Domestic Conference (Not reviewed / Unknown)

• Natsuko Sashi, Erina Yoshida, Hayato Maeda, Kan Hatakeyama, Yuta Nabae, Ririka Sawada, SHINJI ANDO, Teruaki Hayakawa. 誘電損失の低減を目指したダブルデッカー型シルセスキオキサン含有ポリエステルイミドの合成, CSJ化学フェスタ, CSJ化学フェスタ予稿集, Vol. 15, No. 1, p. P1-081, Oct. 2025.
• Natsuko Sashi, Erina Yoshida, Hayato Maeda, Kan Hatakeyama, Yuta Nabae, Ririka Sawada, SHINJI ANDO, Teruaki Hayakawa. 低誘電損失化を目指したダブルデッカーシルセスキオキサン含有半芳香族ポリイミドの合成, 高分子学会, 高分子学会予稿集, Vol. 74, No. 2, Sept. 2025.
• Ririka Sawada, Haonan Liu, SHINJI ANDO. 赤外分光分析を用いた種々のポリイミドの吸湿量および水和構造の解析と10 GHzにおける誘電物性との相関, 高分子学会, 高分子学会予稿集, Vol. 74, No. 2, Sept. 2025.
• Haonan Liu, Ririka Sawada, Yoshiyuki Tsurusaki, SHINJI ANDO, Shana YANAGIMOTO, Yoshiyuki YANAGIMOTO. 5G・6G移動体通信応用に向けたポリイミドの広帯域（10-330?GHz）誘電特性評価, 高分子学会, 高分子学会予稿集, Vol. 74, No. 2, Sept. 2025.
• Haonan Liu, Ririka Sawada, Hiromichi HOSHINA, SHINJI ANDO. テラヘルツ分光法による各種ポリイミドの1-10 THz帯における吸収特性評価, 高分子学会, 高分子学会予稿集, Vol. 74, No. 2, Sept. 2025.
• Ririka Sawada, Haonan Liu, SHINJI ANDO. 赤外分光分析を用いたポリイミドの吸湿挙動解析によるGHz帯誘電物性と吸湿および分子運動性との相関解析, 高分子学会, 高分子学会予稿集, Vol. 74, No. 1, p. 4G20, May 2025.
• Haonan Liu, Ririka Sawada, Shana YANAGIMOTO, Yoshiyuki YANAGIMOTO, SHINJI ANDO. 高周波広帯域 (10~330GHz) の誘電特性で極めて低い周波数依存性と湿度依存性を示す高フッ素化ポリイミド, 高分子学会, 高分子学会予稿集, Vol. 74, No. 1, p. 4G21, May 2025.
• Natsuko Sashi, Erina Yoshida, Hayato Maeda, Kan Hatakeyama, Yuta Nabae, Ririka Sawada, SHINJI ANDO, Teruaki Hayakawa. 低誘電率化を志向したダブルデッカーシルセスキオキサン含有ポリエステルイミドの合成, 高分子学会, 高分子学会予稿集, Vol. 74, No. 1, p. 2B23, May 2025.

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